Back plate of curved display device and curved display device using same

Abstract

A back plate of a curved display device of the present invention includes a first plate, a second plate, and a plurality of spacer units. The first plate has a first periphery, and the second plate has a second periphery. The second periphery is disposed on the first plate, forming an interlayer space therebetween. The first periphery is fastened to the second periphery. The first plate and the second plate are curved corresponding to each other. The spacer units are distributed in the interlayer space and are connected to the first plate and the second plate.

What is claimed is: 
     
       1. A curved back plate, comprising:
 a first plate, having a first periphery; 
 a second plate, having a second periphery, wherein the second plate is disposed on the first plate, forming an interlayer space therebetween; and 
 a plurality of spacer units, distributed in the interlayer space and connected to the first plate and the second plate, 
 wherein the first periphery is fastened to the second periphery, the first plate and the second plate are curved corresponding to each other, the first plate is curved convexly with respect to the second plate and has a bending prestress, and the second plate is curved concavely with respect to the first plate. 
 
     
     
       2. The curved back plate according to  claim 1 , wherein the spacer units are a plurality of bumps extending from the first plate and protruding towards the second plate. 
     
     
       3. The curved back plate according to  claim 2 , wherein a top end of each of the bumps is fixedly connected to the second plate. 
     
     
       4. The curved back plate according to  claim 1 , wherein a distance between neighboring spacer units is not greater than 210 times a thickness of the first plate or the second plate. 
     
     
       5. The curved back plate according to  claim 4 , wherein the distance between neighboring spacer units is not greater than 210 times a thickness of a thinner one of the first plate and the second plate. 
     
     
       6. The curved back plate according to  claim 5 , wherein the interlayer space has a greater height at a center of the first plate than at the first periphery. 
     
     
       7. The curved back plate according to  claim 5 , wherein at least one rib is formed on the first plate, and the spacer units are distributed on two sides of the rib. 
     
     
       8. A curved display device, comprising:
 the curved back plate according to  claim 5 ; and 
 a curved display panel, disposed on an outer side of the first plate and supported by the first plate.